Searched everywhere and no solution: Changing MAC Address?

Guys, I am in need of help. I am trying to set up an AppleTV and I need to have the ability to change the MAC address that the AppleTV reports to the network in order to get it to access it properly. I have an Xbox 360 that was used as an entertainment hub, but was looking to replace it with AppleTV. Has anyone managed to do this before, or is this something that Apple locks us out of?

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